• 제목/요약/키워드: Surface technology

검색결과 19,377건 처리시간 0.044초

A Study on the ENIG Surface Finish Process and Its Properties (ENIG 표면처리 공정 및 특성에 관한 연구)

  • Lee, Hong-Kee;Son, Seong-Ho;Lee, Ho-Young;Jeon, Jun-Mi
    • Journal of the Korean institute of surface engineering
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    • 제40권1호
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    • pp.32-38
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    • 2007

  • Ni coating layers were formed using a newly developed electroless Ni plating solution. The properties of Ni coating layer such as internal stress, hardness, surface roughness, crystallinity, solderability and surface morphology were investigated using various tools. Results revealed that internal stress decreased with plating time and reached $40N/mm^2$ at 20 minutes of the plating time. Hardness increased with increasing P content and thickness. Surface roughness of the pad decreased with Ni and Ni/Au plating. Crystallinity decreased with increasing P content. Solderability based on wettability decreased with Ni and Ni/Au plating. Based on surface morphology, it is expected that Ni coating layer formed using a newly developed electroless Ni plating solution is lower than that formed using a commercial electroless Ni plating solution in possibility of black pad occurrence.

  • https://doi.org/10.5695/JKISE.2007.40.1.032 인용 PDF KSCI

Comparison of variations in sea surface height with sea surface temperature and wind field in the Tropical Pacific Ocean

  • Chul, Kang-Sung;Schumann, Robert;Murai, Shunji;Kiyoshi, Honda;Kim, Young-Seup
    • Proceedings of the KSRS Conference
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    • 대한원격탐사학회 1998년도 Proceedings of International Symposium on Remote Sensing
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    • pp.225-230
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    • 1998

  • The purpose of this study is to contribute the development of an El Nino prediction model. The objectives of the study are to (1) extract sea surface height data from the TOPEI/Poseidon altimeter, and (2) compare the relations among the sea surface height, sea surface temperature and wind field. NOAA AVHRR Multi-channel data is used for sea surface temperature and wind data is derived from ERS 1, 2 AMI wind scatterometer. The results showed that sea surface height has increased significantly during the El Nino season. The sea surface height is positively related to sea surface temperature and negatively related to zonal wind.

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